/*
 * The MIT License
 * Copyright (c) 2012 kc4.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.kc4.sso.auth.section.provider;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.kc4.sso.auth.SSOContextParameters;
import org.kc4.sso.auth.SSOProviderInitParameters;
import org.kc4.sso.auth.section.InterruptedSectionException;
import org.kc4.sso.auth.section.ModelSection;
import org.kc4.sso.crypto.SSOAsymmetricCipher;
import org.kc4.sso.session.SSOSession;
import org.kc4.util.NamedValuesUriBuilder;

/**
 * @author yoichi kikuchi
 *
 */
public class ActiveClientOnValidSessionSection extends ModelSection {

	/**
	 * インスタンスを生成します。
	 *
	 * @param request リクエスト。
	 * @param response レスポンス。
	 */
	public ActiveClientOnValidSessionSection(HttpServletRequest request, HttpServletResponse response) {

		super(request, response);
	}

	@Override
	public void execute() throws InterruptedSectionException {

		HttpSession session = this.getRequest().getSession();

		String contextUrlByUrl = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfContextUrl());
		String callbackByUrl = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfCallback());
		String publickeyByUrl = this.getRequest().getParameter(SSOContextParameters.getInstance().getNamingOfPublickey());

		/*
		 * SSOセッション有効
		 */
		String authorizationTokenBySession = (String) session.getAttribute(SSOContextParameters.getInstance().getNamingOfAuthorizationToken());
		if (authorizationTokenBySession != null && !authorizationTokenBySession.isEmpty()) {

			SSOSession sso = SSOProviderInitParameters
				.getInstance().getSsoSessionStore().get(authorizationTokenBySession);

			/*
			 * SSOセッション有効 > SSOクライアント有効
			 *
			 * => リダイレクト : [コールバック]
			 * => パラメーター : [認証トークン]、[暗号化済み共通鍵]
			 */
			if (sso != null && sso.isActiveClient(contextUrlByUrl)) {

				sso.activateClient(contextUrlByUrl, publickeyByUrl);

				SSOAsymmetricCipher cipher = new SSOAsymmetricCipher(publickeyByUrl);
				String encryptedCommonkey = cipher.encryptAsHex(sso.getCommonkey());

				NamedValuesUriBuilder b = new NamedValuesUriBuilder(callbackByUrl);
				b.append(SSOContextParameters.getInstance().getNamingOfAuthorizationToken(), authorizationTokenBySession);
				b.append(SSOContextParameters.getInstance().getNamingOfEncryptedCommonkey(), encryptedCommonkey);

				this.sendRedirect(b.toString());
				throw new InterruptedSectionException(false);
			}
		}
	}
}
